Dutch officials, unhappy with quarantine conditions, say those who test positive are not allowed outside.

The Dutch delegation said it was unhappy about the quarantine conditions for those who tested positive for the coronavirus, two officials said during a news conference on Tuesday. They said they would raise their concerns with the International Olympic Committee, as well as the Dutch ambassador in Japan.

Six members of the Dutch delegation, including at least two athletes, tested positive for the coronavirus, they said.

“They’ve lost their Olympic dream, and then they’re being put in terrible circumstances,” Maurits Hendriks, the technical director for the Dutch Olympic Committee, said, adding that those quarantined “weren’t allowed to see a moment of daylight.” He called their rooms “little boxes.”

A part of the Dutch delegation left the Netherlands for Tokyo on July 17 on a KLM flight, according to the Dutch broadcaster NOS. Several coronavirus measures were in place then, according to the officials, but people tested positive regardless.

“So you ask yourself, where do you get infected?” It could be before leaving, while at the airport, in the airplane, but also at arrival in Japan,” Mr. Hendriks said.

Mr. Hendriks told the NOS that he had asked Olympic organizers for months about what the protocols would be in this situation. “We would’ve wanted to know this beforehand, so we could’ve done something about it,” he said.

According to the Olympic playbooks, athletes with positive P.C.R. tests are to be isolated at designated facilities, though the location and length of isolation vary depending on the severity of the case. Japan’s health authorities require a 10-day quarantine at facilities outside the Olympic Village, and multiple negative P.C.R. tests before discharge, an I.O.C. official said in an email.